Best Time to Fly MSY to IAD: On-Time Stats by Hour & Airline
Louis Armstrong New Orleans International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 91.9% of New Orleans (MSY) to Washington (IAD) flights arrived on time (631 scheduled flights). That is 14.2 points above the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
September has been the best month (97% on time) and Monday the weakest day of the week (88%).
0.6% of flights were cancelled, versus 1.8% nationally.
MSY to IAD on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 91.8% | 87 min | 0.7% | 613 |
| Frontier Airlines | Limited data | 3 | ||
| Republic Airways | Limited data | 15 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MSY to IAD
On-time arrival % by scheduled departure hour (local time), 1,302 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 10 | |
| 8am–9am | 92.1% | 1.2% | 640 |
| 9am–10am | Limited data | 1 | |
| 11am–12pm | Limited data | 25 | |
| 12pm–1pm | 90.3% | 1.5% | 602 |
| 4pm–5pm | Limited data | 2 | |
| 5pm–6pm | Limited data | 21 | |
| 7pm–8pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MSY to IAD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 28 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 93.5% | +2.2 pts | 0.0% | 31 |
| Summer peak (Jun 15 - Aug 15) | 88.2% | -3.2 pts | 1.0% | 207 |
| All other days | 91.4% | — | 1.4% | 1,036 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).